CVE-2023-39952 - CVE House

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Status published Medium CVE-2023-39952

Advanced permissions not respected when copying entire group folders

6.5 CVSS

Vulnerability Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1, a user can access files inside a subfolder of a groupfolder accessible to them, even if advanced permissions would block access to the subfolder. Nextcloud Server versions 25.0.8, 26.0.3, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1 contain a patch for this issue. No known workarounds are available.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from nextcloud

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Affected Vendor

nextcloud

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Affected Software

security-advisories

Vulnerable Versions:

>= 22.0.0, < 22.2.10.13, >= 23.0.0, < 23.0.12.8, >= 24.0.0, < 24.0.12.4, >= 25.0.0, < 25.0.8, >= 26.0.0, < 26.0.3, >= 27.0.0, < 27.0.1

Timeline

Official Publish: August 10th, 2023

Last Modified: October 8th, 2024

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1078 Valid Accounts

T1213 Data from Information Repositories

T1565.002 Stored Data Manipulation